is concave below; the lip is large, and the rest of the trophi 

 small. X. 2)ipi^tis differs so widely from the others, that I 

 have been compelled to separate it: and I shall here give the 

 characters that distinguish it, and the name assigned to it by 

 by St. Fargeau and Serville, viz. 



SYRITTA. 



Face scarcely tubercled. Eyes with a large portion behind 

 not united in the males. Wings with the discoidal transverse 

 nervure united at right angles. Posterior thighs elongate 

 ovate, dilated, especially towards the apex. Tarsi; posterior 

 with the basal joint short and dilated. 



1. S. pipiens Linn. — Panz. 32. 20.— Harris, j^l- 32./ 48. 



May to the middle of August, flying about flowers, 

 especially mint, in hedges and gardens everywhere. 



XYLOTA. 



P. X. abiens Wied.—Meig. 3. 218. 9. 



I am able to add 3 species unrecorded as British, this being 

 one. I believe I took it in the Isle of Wight, and it may easily 

 be mistaken for the female of Syritta. 

 l"^. X. bifasciata Meig.—Curt. Brit. Ent. yl. 425. c?. 



This handsome insect has never been recorded as British, 

 or figured in any work. Taken the beginning of June on the 

 slapers of trees, and the trunks of those felled and barked in 

 the New Forest; also on plants in ditches at Whittlesea Mere 

 in July. 



2. X. segms Limi. — Panz.60.3. — Brassicaria Z)o?i. 5. p/. 151. 



f. 1. — fucatus Harr. /j/. 24. yi 29. 

 The spine produced by the posterior trochanters of 

 the male (f. 8f), has never been observed by any 

 writer. On trunks of felled trees. New Forest, and on 

 Laurels in May and June at Southgate ; m. August, 

 Dover. 



3. X. ignava Panz. 60. f. 4. Recorded as found near London. 



4. X. lenta Meig. — piger Patiz. 60. 5. 



Beginning of June on slapers of felled trees New Fo- 

 rest; in fields, margins of woods, Southgate ; and end 

 of May, Southampton, Mr. F. Walker: Dinmore, 

 Hereford, Mr. Newman. 



5. X. sylvar um Limi. — impiger Panz. 45. 2 1 . — longisco Harr. 



pi. 24./ 30. 



Posterior trochanters bidentate in the males. On 

 flowers of Dandelion (pi. 248): plants in lanes July 

 and August, Mr. Walker. 



6. X. lateralis Fall. — Meig. 3. 224. 18. — Thereva dubia Fab. 



— M. luteola Gmel. 



I took a female at Whittlesea Mere, w^iich agrees admi- 

 rably with Fabricius's description ; but it may be added, that 

 the posterior tarsi are ochreous, tipped with black. 



The Plant is Bunium Jlcxmstm (Common Earth-nut). 



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